Drawing mechanisms for textile rovings



July 11, 1933. F. CASABLANCAS DRAWING MECHANISMS FOR TEXTILE ROVINGS Fild Feb. 16, 1952 InvenZ'or [@rnmao CwaZZancaJ KIR M Patented July 11, 1933 PATENT oFFicE FERNANDO CASABLANCAS, F SAIBADELL, SPAIN DRAWING MECHANISMS FOR TEXTILE BOVINGS Applioationmed February 16, 1932, Serial No. 593,342, and in Spain February 26, 1981.

This invention constitutes an improvement in the subject matter of my former Patent N 0. 1,765,127. Said former patent refers to improvements in the drawing mechanisms for.

' textile rovings. for spinning or other machines in the textile industry, in which are combined two endless belts or straps which conduct the roving to the drawing cylinders. Said improvements consist specially in arranging the two guide rods which guide internally the front loops of the belts so united as to form one single U-shaped piece. The intention is thus to establish invariably the separation of these two rods and facilitate their placing in the machine, such as disclosed in the above referred to patent, the arrangement of an extension or handle and its painting in various colours, as distinctive of the various separations of rods or branches of these pieces.

The separation of the branches of these U pieces must be very exact and uniform for the belts of all the drawing mechanisms of a machine to work under equal conditions, but in practice conditions frequently arise which cause this separation to vary. One of these conditions is that the U pieces built of wire, in certain cases are bent by falls or undue pressure when stored, thus altering the correct separation of the rods. Sometimes, when apiece has been deformed by any of these causes, the workpeople try again to arrange it, and open or close it by hand, so that it is impossible for the two U branches to remain at the correct distance.

Another still more important cause and which alters the working of the belts is that the filaments which always in greater or lesser number disengage themselves and float in the air of the spinning rooms, introduce themselves between the straps =and the guide-rods and wrap themselves around them. This has exactly the same effect as though the separation between the two rods were to vary, because the effective diameter of these increases, and therefore the straps exercise on the roving a greater pressure than it should.

In order to avoid these variations in the separation of the straps, or rather in the pressure which these straps or belts exercise on the roving, the invention comprises certain modifications or improvements in the form and construction of said U-shaped piece, by which is obtained a much more perfect function of the mechanism, entirely avoidingthese variations in the pressure exercised by the straps on the roving.-

In the drawing is shown a form of execu tion of the U piece which constitutes the object of this invention.

Fig. 1 is an elevation of this U-shaped piece.

Fig. 2 is a transverse-section of the same on line IIII of Fig. 1, and

Fig. 3 isa front view of the cylinders with the endless belts and U piece, seen from front.

As is shown in the drawing, piece 10 in the shape of a U, presents branches 11, 12 which extend in parallel relation and have their ends 13 and 14 thinned or pointed, in order .to, facilitate their introduction into the straps. The branches of the U have been rounded inside at 15 in order to lessen frictional contact with the straps, and on the other hand present abrupt edges at their outer sides 16, to prevent the fluff or loose fibres from winding around the rods and press the straps against one another.

At the central part of this U piece, there is an enlargement 20 formed of the same material, and which serves to hold and manipulate the pieces and to facilitate their placing in the machine. In this enlargement 20 may be inserted a small coloured disk 21 or other distinctive mark or element, which will serve to distinguish the pieces of different gauges or separations and prevent them from being mixed in the same machine. i

These pieces are placed in the machine. in the same way as the former ones of the patcut above referred to were used, and are mounted, as seen in Fig. 3, so that the two straps 30, 31 pass between the two branches or guide-rods 11 and 12, the piece remaining upheld by the lateral plates of the frame 33. In one of the branches of the piece, for example the lower one, there is a notch 34, with the object that when inserted between the straps it remains latched to the lateral frame 33, thus remaining in an unvariable and fixed position.

These pieces are made either of a very strong and tenacious metal so as not to be deformable by the rough handling to which, in practice, they may be submitted, or else of some cast metal, of little ductility and brittle, so that the piece may possess a certain rigidity and cannot be easily deformed, but breaks if submitted to an undue effort, which constitutes a guarantee that all the pieces are capable of producing perfect and uniform work.

I claim 1. A belt spacing device for roving machines having a supporting frame and a pair of spaced belts therein, comprising a rigid non-deformable body portion having spaced parallel rods adapted to inserted beneath the opposed belts for holding the same in predetermined closely spaced apart relation and having rounded inner edges for decreasing frictional contact between the rods and the belts, said rods having abrupt edges at their outer sides to offset wrapping of the loosened flufl from the roving around the rods and maintain the rounded edges of the rods clear.

2. A belt spacing device for roving machines having a. supporting frame and a pair of spaced belts therein, comprising a rigid non-deformable U-shape body portion having spaced apart parallel rods pointed at their ends for introduction into said belts and having opposed rounded edges at their inner sides for reducing frictional contact with the belts and maintaining the same at all times in relative positions, said rods having at their outer sides flat faces presenting abrupt edges adapted to prevent accumulation and wrapping of loosened fluff from the roving about the rods and over the rounded edges thereof, said body portion having an indicating part at its closed end for identifying the particular body portion with its rods definitely spaced apart, said body portion also having a notch in one edge for interfitting engagement with the frame to support the spacing device in a predetermined position relatively to the belts.

In testimony whereof I have signed my name to this specification.

FERNANDO CASABLANCAS. 

